7/17/2019 Flange

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This standard provides specifications on steel flanges (hereinafter referred to as “flanges”) for connecting steel pipes, valves, and accessories for stainless pipingof common pipes, pressure pipes , high pressure pipes, high-temp erature pipes, and steel alloy pi pes for steam, air, gas, water, and oil.

Ext ract ed from JIS B2220-2004

See Tab.1 “Pressure-Temperature Standard” and Tab. 2 “Symbols of Material Group” for the relationship between temperature and maximum working pressure of fluids. The classification ( ) in Appendix 1 depends on the class of flange and material group (refer to JIS B2220-2004).~Ⅰ Ⅲ

Tab.1 Pressure-Temperature Standard

N o m i n a lpressure

Symbol of material groupmaterial specified

Classification

Max. working pressure

Temperature of fluid

5k

10k

16k

20k

30k

001,002,003a

021a,021b,022a,022b

023a,023b

001,002,003a

021a,021b,022a,022b

023a,023b

002,003a

021a,021b,022a,022b

023a,023b

002,003a

021a,021b,022a,022b

023a,023b

002,003a013a

015a

021a,021b,022a,022b

023a,023b

T ~120L   220 300 350

  Ⅱ Ⅱ Ⅱ Ⅱ

0.7

0.7

0.7

1.4

1.4

1.4

2.7

2.7

2.7

3.4

3.4

3.4

5.15.1

5.1

5.1

5.1

0.5

0.5

0.5

1.0

1.0

1.0

1.6

1.6

1.6

2.0

2.0

2.0

3.93.9

3.9

3.9

3.5

0.6

0.6

0.6

1.2

1.2

1.2

2.5

2.5

2.5

3.1

3.1

3.1

4.64.6

4.6

4.6

4.6

0.5

0.5

0.5

1.0

1.0

0.9

1.6

1.6

1.6

2.0

2.0

2.0

3.93.9

3.9

3.6

3.0

0.5

0.5

0.5

1.0

1.0

1.0

2.3

2.3

2.3

2.9

2.9

2.9

4.34.3

4.3

4.3

4.3

0.5

0.5

0.5

1.0

1.0

0.8

1.6

1.6

1.5

2.0

2.0

1.9

3.93.9

3.9

3.4

2.9

2.1

2.1

2.1

2.6

2.6

2.6

3.93.9

3.9

3.9

3.9

1.6

1.4

2.0

1.7

3.9

3.9

3.0

2.6

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

0.5

0.5

0.5

1.0

1.0

1.0

1.6

1.6

1.6

2.0

2.0

2.0

3.9

3.5

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

JIS G 3101

4051

4051

JIS G

JIS G

JIS G 4304

JIS G 4305

JIS G 4304

JIS G 4305

JIS G 4304

JIS G 4305

JIS G 4304

JIS G 4305

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

SUS304SUS304

SUS316SUS316

SUS304LSUS304L

SUS316LSUS316L

SS400

S20C

S25C

JIS G 3201

3202

3201

3202

3203

3203

JIS G

JIS G

JIS G

JIS G

JIS G

JIS G 3214

JIS G 3214

JIS G 3214

JIS G 3214

 ─ 

 ─ 

SF390A

SFVC 1

SF440A

SFVC 2A

SFVA F1

SFVA F11A

JIS G 5101

5151JIS G

JIS G 5101

JIS G 5151

JIS G 5151

JIS G 5151

SC410

SCPH1

SC480

SCPH2

SCPH11

SCPH21

002

003a

013a

015a

JIS G 5121

JIS G 5121

JIS G 5121

JIS G 5121

001

021a

021b

022a

022b

023a

023b

SCS13A

SCS19A

SCS14A

SCS16A

SUS F316L

SUS F304L

SUS F316

SUS F304

 ─ 

 ─ 

G2,G3

D1,M1,M2

G2,D1,M1,M2

G3,M1

D1,M2

G2,G3

D1,M1,M2

G2,G3

D1,M1,M2

-10~120 220 300 350

0.7

0.7

1.4

1.4

0.7

2.2

2.2

2.8

2.8

0.5

0.6

1.0

1.2

1.6

2.0

2.0

2.5

1.6

2.0

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

G1 (2)

G2

G3

D1

D2(2)

M1

M2

(145)

200

214

250

415

350

400

450

(400)

(600)

270

300

340

350

18

22

15

10

(5)

(3)

5

6

10

10

276

220

250

280

(300)

(370)

165

190

220

200

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

JIS G 5501

5501

8270

5502

5502

5502

JIS G

JIS G

JIS G

JIS G

JIS G

FC200

250

F CD -S ( 1)

350

400

450

FCBM27-05

FCMB35-10

35-10S(1)

FC

FCD

FCD

FCD

FCMB

JIS G 5705

Mat eri al Mechanical pr opert y Mat eri al spec.

TypeSymbol of materialgroup

Min. tens i les trength

Min.Extens ion

0.2% min.Durabi l i ty   Standard No.

  Materialsymbol

Cast iron

Duct i lecast iron

Forgedsteel

Note: Generally, it is not necessary to consider the impact of material, except that applicable lawsor regulations require.The symbols (G1 and D2) of material group are for reference purpose. They represent thestructure of material group. The numbers in squares, which show the mechanical propertiesof materials, come from relevant standards.

2.

1.

Use proportional interpolation method to determine maximum working pressurefor applications with temperature between the temperatures shown in the table.

Note:1.

Nominalpressure

Symbol of material group

Max. working pressure

Temperature of fluid

5K

10K

16K

20K

10K thin type

Tab.2 Material Gro upTab.1 Pressure-Temperature Standard

This standard provides specifications on cast iron flanges for cast iron pipes, fitting, valves etc. for steam, air, gas, water, oil, and other fluids.

See Tab.1 “Pressure-Temperature Standard” and Tab. 2 “Symbols of Material Group” for the relationship between temperature and maximum working pressure

of fluids.

Pressure Rating of Cast Iron Flange for Piping (JIS B2239-2004)

SS400 (JIS G 3101) and SF390A and SF440A (JIS G 3201) are for materials with carbon content less than 0.33%.

S20C and S25C (JIS G 4051) should be tested according to JIS G 0303. The tensile strength of S20C should be larger than 400N/mm , and for S25C, the tensile strength of should be larger than 440N/mm .2 2

Note:

2.

1.

Tab.2 Material Grou p

Stainless steel

Low-alloy steel

Carbon steel

Symbol of material groupStandard materialStandard No.

Forged materialRolled materialType of material

  Forged material

Standard materialSt andar d No. St andar d mater ialStandard No.

0.5

1.0

1.8

2.3

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

JIS G 5705

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

 ─ 

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